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Silkworm pupae derivatives as source of high value protein intended for pasta fortification

机译:Silkworm pupae derivatives as source of high value protein intended for pasta fortification

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Abstract Silkworm (Bombyx mori) pupae are recognized as novel nutritionally valuable food. Their use in pasta‐making was considered with the intention of repositioning spaghetti shaped pasta supplemented with silkworm derivatives (10db) as a valuable product in sustainable diets besides upcycling a side stream from the silk industry. The principal objective of this study was to assess the cooking quality (i.e., imbibition kinetics, cooking loss) and texture of pasta supplemented with defatted silkworm powder or with its aqueous protein extract, which enabled to reduce the content of indigestible components supplying a similar protein intake. Pasta was produced on lab‐scale, dried, and tested for chemical composition, mechanical properties before and during cooking, cooking behavior in terms of hydration kinetics, starch gelatinization, and cooking quality indexes. The structural roles on pasta protein network played by silkworm powder and proteins extract were investigated. The former behaves as a structural thickener while the second provides a steric hindrance effect with consequent different cooking performances. With regards to the fortified pasta perceived quality, a high level in total color difference (ΔE) was measured (ΔE > 6). However, after fortification agents’ addition, pasta color became closer to that of the whole wheat pasta already known by consumers. Structure fragility increased. The energy at break of the “extract pasta” was about one‐third of the control (0.849 N*mm). Silkworm powder addition led to the highest pasta optimal cooking time (376 s) and the slowest imbibition rate (0.0001 s−1). After fortification, pasta had an almost doubled cooking loss than control pasta (2.97 ± 0.18 g/100gdb). Practical Application Silkworm pupae flour can be easily applied for pasta fortification in order to increase the protein daily intake of people in an easy and practical way.

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